119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*-
|
|
* Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/ioccom.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
|
|
|
|
MALLOC_DECLARE(M_VCIO);
|
|
MALLOC_DEFINE(M_VCIO, "vcio", "VCIO temporary buffers");
|
|
|
|
static struct cdev *sdev;
|
|
static d_ioctl_t vcio_ioctl;
|
|
|
|
static struct cdevsw vcio_devsw = {
|
|
/* version */ .d_version = D_VERSION,
|
|
/* ioctl */ .d_ioctl = vcio_ioctl,
|
|
};
|
|
|
|
#define VCIO_IOC_MAGIC 100
|
|
#define IOCTL_MBOX_PROPERTY _IOWR(VCIO_IOC_MAGIC, 0, char *)
|
|
|
|
int
|
|
vcio_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int mode,
|
|
struct thread *td)
|
|
{
|
|
int error;
|
|
void *ptr;
|
|
uint32_t size;
|
|
uint8_t *property;
|
|
|
|
error = 0;
|
|
switch(cmd) {
|
|
case IOCTL_MBOX_PROPERTY:
|
|
memcpy (&ptr, arg, sizeof(ptr));
|
|
error = copyin(ptr, &size, sizeof(size));
|
|
|
|
if (error != 0)
|
|
break;
|
|
property = malloc(size, M_VCIO, M_WAITOK);
|
|
|
|
error = copyin(ptr, property, size);
|
|
if (error) {
|
|
free(property, M_VCIO);
|
|
break;
|
|
}
|
|
|
|
error = bcm2835_mbox_property(property, size);
|
|
if (error) {
|
|
free(property, M_VCIO);
|
|
break;
|
|
}
|
|
|
|
error = copyout(property, ptr, size);
|
|
free(property, M_VCIO);
|
|
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vcio_load(module_t mod, int cmd, void *arg)
|
|
{
|
|
int err = 0;
|
|
|
|
switch (cmd) {
|
|
case MOD_LOAD:
|
|
sdev = make_dev(&vcio_devsw, 0, UID_ROOT, GID_WHEEL, 0600, "vcio");
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
destroy_dev(sdev);
|
|
break;
|
|
|
|
default:
|
|
err = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return(err);
|
|
}
|
|
|
|
DEV_MODULE(vcio, vcio_load, NULL);
|
|
MODULE_DEPEND(vcio, mbox, 1, 1, 1);
|